Redtooth Genealogist is a common Creature — Elf Advisor card from Wilds of Eldraine (WOE), collector number 179. Current market price: $0.14 (foil $0.12), TCGplayer market prices via Scryfall.
When this creature enters, create a Royal Role token attached to another target creature you control. (If you control another Role on it, put that one into the graveyard. Enchanted creature gets +1/+1 and has ward {1}.)